wallet2: force using output distribution for ringct outs

Co-authored-by: j-berman <justinberman@protonmail.com>

src/wallet/wallet2.cpp

@@ -8049,8 +8049,13 @@ void wallet2::get_outs(std::vector<std::vector<tools::wallet2::get_outs_entry>>
         has_rct = true;
         max_rct_index = std::max(max_rct_index, m_transfers[idx].m_global_output_index);
       }
-    const bool has_rct_distribution = has_rct && (!rct_offsets.empty() || get_rct_distribution(rct_start_height, rct_offsets));
-    if (has_rct_distribution)
+
+    if (has_rct && rct_offsets.empty()) {
+      THROW_WALLET_EXCEPTION_IF(!get_rct_distribution(rct_start_height, rct_offsets),
+          error::get_output_distribution, "Could not obtain output distribution.");
+    }
+
+    if (has_rct)
     {
       // check we're clear enough of rct start, to avoid corner cases below
       THROW_WALLET_EXCEPTION_IF(rct_offsets.size() <= CRYPTONOTE_DEFAULT_TX_SPENDABLE_AGE,
@@ -8062,11 +8067,11 @@ void wallet2::get_outs(std::vector<std::vector<tools::wallet2::get_outs_entry>>
     // get histogram for the amounts we need
     cryptonote::COMMAND_RPC_GET_OUTPUT_HISTOGRAM::request req_t = AUTO_VAL_INIT(req_t);
     cryptonote::COMMAND_RPC_GET_OUTPUT_HISTOGRAM::response resp_t = AUTO_VAL_INIT(resp_t);
-    // request histogram for all outputs, except 0 if we have the rct distribution
+    // request histogram for all pre-rct outputs
     req_t.amounts.reserve(selected_transfers.size());
     for(size_t idx: selected_transfers)
-      if (!m_transfers[idx].is_rct() || !has_rct_distribution)
-        req_t.amounts.push_back(m_transfers[idx].is_rct() ? 0 : m_transfers[idx].amount());
+      if (!m_transfers[idx].is_rct())
+        req_t.amounts.push_back(m_transfers[idx].amount());
     if (!req_t.amounts.empty())
     {
       std::sort(req_t.amounts.begin(), req_t.amounts.end());
@@ -8166,7 +8171,7 @@ void wallet2::get_outs(std::vector<std::vector<tools::wallet2::get_outs_entry>>
     COMMAND_RPC_GET_OUTPUTS_BIN::response daemon_resp = AUTO_VAL_INIT(daemon_resp);
 
     std::unique_ptr<gamma_picker> gamma;
-    if (has_rct_distribution)
+    if (has_rct)
       gamma.reset(new gamma_picker(rct_offsets));
 
     size_t num_selected_transfers = 0;
@@ -8181,7 +8186,7 @@ void wallet2::get_outs(std::vector<std::vector<tools::wallet2::get_outs_entry>>
       // request more for rct in base recent (locked) coinbases are picked, since they're locked for longer
       size_t requested_outputs_count = base_requested_outputs_count + (td.is_rct() ? CRYPTONOTE_MINED_MONEY_UNLOCK_WINDOW - CRYPTONOTE_DEFAULT_TX_SPENDABLE_AGE : 0);
       size_t start = req.outputs.size();
-      bool use_histogram = amount != 0 || !has_rct_distribution;
+      bool use_histogram = amount != 0;
 
       const bool output_is_pre_fork = td.m_block_height < segregation_fork_height;
       uint64_t num_outs = 0, num_recent_outs = 0;
@@ -8368,7 +8373,7 @@ void wallet2::get_outs(std::vector<std::vector<tools::wallet2::get_outs_entry>>
 
           uint64_t i;
           const char *type = "";
-          if (amount == 0 && has_rct_distribution)
+          if (amount == 0)
           {
             THROW_WALLET_EXCEPTION_IF(!gamma, error::wallet_internal_error, "No gamma picker");
             // gamma distribution
@@ -8530,7 +8535,7 @@ void wallet2::get_outs(std::vector<std::vector<tools::wallet2::get_outs_entry>>
           break;
         }
       }
-      bool use_histogram = amount != 0 || !has_rct_distribution;
+      bool use_histogram = amount != 0;
       if (!use_histogram)
         num_outs = rct_offsets[rct_offsets.size() - CRYPTONOTE_DEFAULT_TX_SPENDABLE_AGE];